Manufacturer-documented fuel consumption for 17 45–50 kW Bi-Fuel (NG/LP) generator sets — median 2.10 gal/h at full load, 2.06 gal/h at half load.
Compare 45–50 kW Bi-Fuel (NG/LP) generator specs side-by-side →
| Model | kW | gal/h @ 50% | gal/h @ 100% | Tank (L) | Runtime @ 50% (h) |
|---|---|---|---|---|---|
| Cummins/Onan C45 N6 | 45 | — | 2.05 | — | — |
| Cummins/Onan RX 45 | 45 | — | 8.00 | — | — |
| Generac G45LG2 | 45 | 129.44 | 215.83 | — | — |
| Generac QT045 | 45 | 3.25 | 4.70 | — | — |
| Generac QT04524 | 45 | — | 0.90 | — | — |
| Generac RG045 | 45 | 0.87 | 1.24 | — | — |
| Generac RG04524ANAC | 45 | — | 2.10 | — | — |
| Generac RG04524ANAX | 45 | — | 2.10 | — | — |
| Generac SG045 | 45 | 1.22 | 2.03 | — | — |
| SDMO G66 | 45 | 1.16 | 1.90 | — | — |
| Generac QT048 | 48 | 2.06 | 3.43 | — | — |
| Generac QT04854 | 48 | — | 0.90 | — | — |
| Generac RG048 | 48 | 1.10 | 1.75 | — | — |
| Generac RG04845 | 48 | — | 1.75 | — | — |
| Generac XG04845 | 48 | 2.22 | 3.58 | — | — |
| Kohler 48RCL | 48 | — | 74.76 | — | — |
| Kohler 60REZG | 49 | 3.88 | 5.92 | — | — |
Figures from each model’s own manufacturer documentation (spec sheets and manuals); runtime = documented tank capacity ÷ consumption at 50% load. Verify against the datasheet for your exact configuration.
Across 17 models with manufacturer data, full-load consumption runs 0.90–215.83 gal/h (median 2.10); at 50% load the median is 2.06 gal/h.